Siemens SINAMICS G120C Compact Converter 4kW PROFINET

Technical Overview

Compact 4kW/3kW (LO/HO) VFD with 380-480V 3AC input, PROFINET/EtherNet/IP, IP20, and integrated Safe Torque Off. Features sensorless vector control.

Key Features

Input: 3 AC, 380-480 V (+10% / -20%), 47-63 Hz
Output Power: 4.00 kW (LO) / 3.00 kW (HO)
Output Current: 8.80 A (LO) / 7.30 A (HO); max. 14.60 A
Output Frequency: 0-240 Hz (vector control), 0-550 Hz (V/f control)
Communication Interfaces: PROFINET, EtherNet/IP
Digital Inputs: 6 standard, 1 fail-safe
Digital Outputs: 1 relay changeover, 1 transistor
Analog Input: 1 differential 10-bit
Analog Output: 1 non-isolated
Motor Temperature Sensor Interface: PTC, KTY, Thermo-Click
Efficiency: 0.97 (97%)
Degree of Protection: IP20 / UL open type
Integrated Safe Torque Off (STO) functionality
High overload capability: 200% for 3 s (HO)
Sensorless vector control and V/f ECO modes

Technical Specification Matrix

Parameter	Value
Input Voltage (AC)	380-480 V (3 AC)
Input Frequency	47-63 Hz
Rated Power (Low Overload)	4.00 kW / 5.00 hp
Rated Power (High Overload)	3.00 kW / 4.00 hp
Rated Current (Low Overload)	8.80 A
Rated Current (High Overload)	7.30 A
Max. Output Current	14.60 A
Output Frequency (Vector Control)	0-240 Hz
Output Frequency (V/f Control)	0-550 Hz
Communication Protocols	PROFINET, EtherNet/IP
Digital Inputs (Standard)	6
Digital Inputs (Fail-Safe)	1
Digital Outputs (Relay)	1 (changeover contact)
Digital Outputs (Transistor)	1
Analog Inputs	1 (differential 10-bit)
Analog Outputs	1 (non-isolated)
Motor Temperature Sensor Input	1 (PTC, KTY, Thermo-Click compatible)
Efficiency	97%
Efficiency Class	IE2 per IEC 61800-9-2
IP Rating	IP20
Ambient Operating Temperature	-10 to 40°C
Overload Capability (LO)	150% for 3s, 110% for 57s in 300s cycle
Overload Capability (HO)	200% for 3s, 150% for 57s in 300s cycle
Integrated Safety Function	Safe Torque Off (STO)
Filter Class	Unfiltered
Physical Weight (kg)	2.1
Dimensions L x W x H (cm)	22.5 x 27 x 8.5

Industrial Applications

1. Conveyor Systems with Integrated Safety

This compact converter is ideal for controlling motors in conveyor and material handling systems where precise speed control and robust safety features are paramount. Its PROFINET/EtherNet/IP communication allows for seamless integration into factory automation networks, while the integrated Safe Torque Off (STO) ensures critical safety functions are met, protecting personnel and equipment during operation and maintenance.

Problem Solved

Ensures safe and precise speed control for material transport, reducing risk to personnel during operation and maintenance, and integrates seamlessly into existing network architectures.

Variable Frequency DrivePROFINETEtherNet/IPSafe Torque Off (STO)Material HandlingMotor ControlIP20Compact Size

2. HVAC Systems for Energy-Efficient Fan/Pump Control

Suitable for optimizing energy consumption in Heating, Ventilation, and Air Conditioning (HVAC) systems by providing variable speed control for fans and pumps. Its V/f ECO modes and high efficiency (97%) contribute to significant energy savings, adjusting motor speed to match demand. The IP20 rating makes it suitable for installation within protected control panels in commercial or industrial buildings.

Problem Solved

Provides energy-efficient and precise speed control for fans and pumps, leading to reduced operational costs and improved system performance in building automation.

HVACFan ControlPump ControlEnergy EfficiencyV/f ControlVariable Speed DriveBuilding AutomationIP20

3. General Industrial Machinery Control

The converter offers a versatile solution for general industrial machinery, such as mixers, extruders, or small processing units, that require accurate speed and torque regulation. The sensorless vector control eliminates the need for external encoders, simplifying setup and reducing costs. Ample digital and analog I/O allow flexible interfacing with various machine sensors and control logic, accommodating diverse industrial applications within its power range.

Problem Solved

Offers a cost-effective and flexible solution for controlling various industrial machines requiring precise speed and torque control without complex feedback systems, and provides ample I/O for machine integration.

Sensorless Vector ControlMotor ControlDigital I/OIndustrial MachineryProcess ControlVariable Frequency DriveOverload Capability